MATLAB: How to use Simulink Test with ‘nodisplay’ option enabled

simulink

When I use Simulink Test with 'nodisplay' option enabled, I am getting the following error :

"Harness operations are not supported because MATLAB was started with -nodisplay option. Please restart MATLAB without this option to enable harness operations". So is there any workaround so that Simulink Test can be used with 'nodisplay' option on?

Best Answer

The only harness operations that are not supported with the -nodisplay option are:

1. harness creation with Signal Builder source

2. harness open (can do load instead of open)

3. push and rebuild

Everything else should work with this option. To work around this,

1. Create harnesses with other types of source (Inport, Test Sequence, etc)

2. Use sltest.harness.load instead of sltest.harness.open in scripts.

3. When creating harnesses, pass in the name/value pair ('RebuildOnOpen', false) as follows:

>> sltest.harness.create(harnessOwner, 'Name', 'h1', 'Source', 'Inport', 'RebuildOnOpen', false)

Related Solutions

MATLAB: The “runtests” function suppresses exceptions and errors thrown within TLC files

The reason the errors are suppressed is that the output of the "feval" call is being recognized as text by "runtests". Making the following modifications to the test script and the "tlc" file will ensure that the error is thrown.

In "test.m":

tlc -da mytlc.tlc;

Then in "mytlc.tlc":

%assign a = FEVAL("sub_failFunction",1,2)
%assert a!=0

Using this method, an additional "assert" statement is added in the end of the "tlc" file. The test will fail as "a" is zero when "sub_failFunction" throws an error. However, note that if zero is a valid return value for "sub_failFunction", the function should be modified so that it doesn't return zero under normal circumstances e.g. zero could be mapped to some special, otherwise unused value in "sub_failFunction".

MATLAB: How to create a test harness without doing a model compilation in R2020a

You can do this easily with the toolbox Simulink Test.

There you can create a test harness while not compiling the model, as you can see below:

More information can be found here:

https://www.mathworks.com/help/releases/R2020a/sltest/ug/select-test-harness-properties-for-your-task.html

"Create without compiling the model

Creating a test harness without compiling the model can be useful if you are prototyping a design that cannot yet compile. When you create a test harness without compiling the main model:

Parameters are not copied to the test harness workspace.
The main model configuration is not copied to the test harness.
The test harness does not contain conversion subsystems.

You may need to add blocks such as signal conversion blocks to the test harness. You can rebuild the harness when you are ready to compile the main model. For more information, see Synchronize Changes Between Test Harness and Model.

Test harnesses for Subsystem models are created without compiling the model."

If you want to do this programmatically, you can use the command:

>> sltest.harness.create

which is documented here:

https://www.mathworks.com/help/releases/R2020a/sltest/ref/sltest.harness.create.html

Using this command, you can set the following option:

'CreateWithoutCompile'

to 'true' or 'false'.

Best Answer

Related Solutions

MATLAB: The “runtests” function suppresses exceptions and errors thrown within TLC files

MATLAB: How to create a test harness without doing a model compilation in R2020a

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